diff options
| author | David Sterba <dsterba@suse.com> | 2019-05-02 17:53:47 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-07-02 13:30:47 +0300 |
| commit | 00801ae4bb2be5f5af46502ef239ac5f4b536094 (patch) | |
| tree | d9835c3f4d44ecc3c4aa15c3707c4aea1a243ee3 | |
| parent | f3dc24c52a28c700e35757dce7b38456888071e1 (diff) | |
| download | linux-00801ae4bb2be5f5af46502ef239ac5f4b536094.tar.xz | |
btrfs: switch extent_buffer write_locks from atomic to int
The write_locks is either 0 or 1 and always updated under the lock,
so we don't need the atomic_t semantics.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/extent_io.c | 2 | ||||
| -rw-r--r-- | fs/btrfs/extent_io.h | 2 | ||||
| -rw-r--r-- | fs/btrfs/locking.c | 6 | ||||
| -rw-r--r-- | fs/btrfs/print-tree.c | 2 |
4 files changed, 6 insertions, 6 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index fef346c63203..464e6b761a9c 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -4879,7 +4879,7 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start, eb->spinning_writers = 0; atomic_set(&eb->spinning_readers, 0); atomic_set(&eb->read_locks, 0); - atomic_set(&eb->write_locks, 0); + eb->write_locks = 0; #endif return eb; diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 5616b96c365d..844e595cde5b 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -190,7 +190,7 @@ struct extent_buffer { int spinning_writers; atomic_t spinning_readers; atomic_t read_locks; - atomic_t write_locks; + int write_locks; struct list_head leak_list; #endif }; diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 270667627977..98fccce4208c 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -58,17 +58,17 @@ static void btrfs_assert_tree_read_locked(struct extent_buffer *eb) static void btrfs_assert_tree_write_locks_get(struct extent_buffer *eb) { - atomic_inc(&eb->write_locks); + eb->write_locks++; } static void btrfs_assert_tree_write_locks_put(struct extent_buffer *eb) { - atomic_dec(&eb->write_locks); + eb->write_locks--; } void btrfs_assert_tree_locked(struct extent_buffer *eb) { - BUG_ON(!atomic_read(&eb->write_locks)); + BUG_ON(!eb->write_locks); } #else diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c index c5cc435ed39a..9cb50577d982 100644 --- a/fs/btrfs/print-tree.c +++ b/fs/btrfs/print-tree.c @@ -153,7 +153,7 @@ static void print_eb_refs_lock(struct extent_buffer *eb) #ifdef CONFIG_BTRFS_DEBUG btrfs_info(eb->fs_info, "refs %u lock (w:%d r:%d bw:%d br:%d sw:%d sr:%d) lock_owner %u current %u", - atomic_read(&eb->refs), atomic_read(&eb->write_locks), + atomic_read(&eb->refs), eb->write_locks, atomic_read(&eb->read_locks), eb->blocking_writers, atomic_read(&eb->blocking_readers), |